A single night of taking the drug Ecstasy (搖頭丸) can cause serious brain damage and speed up the start of Parkinson’s disease(帕金森綜合癥), scientists say. Just two or three Ecstasy tablets can permanently destroy brain cells that affect movement and reasoning, according to American research that links the drug to Parkinson’s for the first time.
A study by a team at Johns Hopkins University in Baltimore, Maryland, involving squirrel monkeys and baboons (狒狒) found that both species suffered permanent damage to key cells, which are lost in Parkinson’s, after receiving three low doses(劑量)of Ecstasy at three-hour periods.
The study is particularly important because baboons are one of the best animal models for the human brain. George Ricaurte, who led the research, said that the widespread abuse of drug might have caused severe damage. “The most troubling result is that young adults using Ecstasy may be increasing their risk of developing Parkinsonism as they get older.”
Alan Leshner, a former director of the US National Institute on Drug Abuse, said, “This study emphasizes the multi-aspect damage that Ecstasy causes to users. We’ve long known that repeated use damages brain cells. But this study shows that even very occasional(偶爾) use can have long-lasting effects on many different brain systems. It sends an important message to young people: don’t experiment with your own brain.”
Janet Betts, a mother whose teenage daughter Leah died after a single Ecstasy tablet in 1995, said, “This comes as no surprise. But people can’t see the effects at first, and they say it won’t happen to them. We’ll see the symptoms later, just as we have with smoking.”
小題1:The article is intended to ______.
A.explain the bad effects of drugs on people’s health
B.warn young people of the risk of taking the drug Ecstasy
C.persuade people out of such bad habits as smoking and using drugs
D.tell us the links between the drug Ecstasy and the animal models
小題2:We know from the passage that a low dose of Ecstasy ______.
A.can permanently destroy one’s brain cells
B.can cause serious brain damage occasionally
C.will result in immediate symptoms
D.may bring on Parkinson’s at once
小題3:Why are squirrel monkeys and baboons involved in the experiments?
A.Because these animals usually take drugs.
B.Because their brain is similar to human beings.
C.Because there is a model in the animals’ brains.
D.Because they will soon get well after the experiment.
小題4:The underlined word “it” in the last paragraph probably refers to”        ”.
A.Leah’s death after a single tablet
B.the symptoms after smoking
C.the damage to the brain systems
D.repeated use of the drug

小題1:B
小題1:A
小題1:B
小題1:C
練習冊系列答案
相關(guān)習題

科目:高中英語 來源:不詳 題型:閱讀理解

Most people agree that it’s important to have a sense of humour. Having the ability to laugh can help one overcome anxiety, and make better decisions in difficult situations. People with a well-developed sense of humour appear to be happier, and some are healthier as well. This suggests that having a sense of humour is good for you. Humourless people may find themselves being treated as a fool, and become anxious and upset.
A sense of humour also plays an important role in human relationships. However, not everyone has a sense of humour. People with developmental disabilities (發(fā)展性能力喪失) can sometimes have no sense of humour, or have a very strange one.
A number of factors affect a person’s sense of humour, with the age probably being the main one. Young children are often highly amused by simple jokes or shows, while teenagers prefer to enjoy the ironic (諷刺的) events. Educational level, culture, and religious faith also affect one’s sense of humour. While Christians, for example, may have a deep appreciation of jokes about the Bible, others may find them disrespectful.
Many people believe that a sense of humour is something that develops on its own, and that you cannot teach someone to understand why jokes, certain comments, situations or events are funny. However, things can be done to enhance one’s sense of humour. Children, for example, benefit from being told jokes and encouraged to laugh, although some children’s jokes might seem rather strange to adults. If you have children, try to encourage them to tell jokes and think about what makes things funny. And it will help them develop a sense of humour.
小題1:The purpose of the passage is to _______.
A.explain what influences a person’s sense of humour
B.tell readers the importance of being healthy
C.explain how to make better decisions
D.tell readers how to understand jokes
小題2:What does the underlined word in Paragraph 4 "enhance" probably mean?
A.Enjoy.B.Reduce.C.Improve.D.Prevent.
小題3:According to the passage, which of the following doesn’t influence one’s sense of humour?
A.Culture.B.Age.
C.Educational level.D.Family backgrounds.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

For well over a thousand years, smallpox was a disease that everyone feared. The disease killed much of the native population in South America when the Spanish arrived there in the early sixteenth century. By the end of the eighteenth century, smallpox was responsible for about one in ten deaths around the world. Those who survived the disease were left with ugly scars on their skin.
It had long been well known among farmers that people who worked with cows seldom caught smallpox; instead, they often caught a similar but much milder disease called cowpox (牛痘) . A British doctor called Jenner was extremely interested in this, and so he studied cowpox. He believed that, by vaccinating (給接種疫苗) people with the disease, he could protect them against the much worse disease smallpox. In 1796, he vaccinated a boy with cowpox and, two months later, with smallpox. The boy did not get smallpox. In the next two years, Jenner vaccinated several children in the same way, and none of them got the disease.
News of the success of Jenner’s work soon spread. Vaccination soon became a common method to protect people against other diseases caused by virus, such as rabies (狂犬病), and vaccines were sent across the world to the United States and India.
It took nearly two centuries to achieve Jenner’s dream of getting free of smallpox from the whole world. In 1967, the world Health Organization (WHO) started a great vaccination program, and the last known case of smallpox was recorded in Somalia in 1977. The story of vaccinations does not end there, however. There are many other diseases that kill more and more people every year. Besides, many new diseases are being discovered. The challenge for medical researchers will, therefore, probably continue for several more centuries
小題1:Smallpox was so serious that _________________ by the end of l8th century
A.its death rate was up to ten percent
B.those who caught it were certain to die
C.one in ten people in the world died of smallpox
D.one in ten deaths in the world was caused by smallpox
小題2:Edward Jenner discovered that vaccination with cowpox could ____________.
A.make smallpox much milder
B.stop people from getting smallpox
C.protect people against any disease
D.prevent people’s scars after smallpox
小題3:Which of the following statements is NOT TRUE?
A.The first experiment with cowpox was made by a British doctor.
B.After 1977 smallpox disappeared around the world according to WHO.
C.Vaccination had existed among ordinary farmers before being discovered.
D.Vaccination can be used to protect people in the world against not only smallpox.
小題4:The author of the passage thinks that _________________.
A.vaccinations bring many new problems
B.vaccinations end the spread of diseases
C.there is a long way to go to fight against diseases
D.there is a long way to go to discover new diseases

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

For centuries, the body's blood has been linked closely with the emotions.People who show no human emotions or feelings, are said to be cold-blooded killer.For example, the police are searching for a cold-blooded killer.He seems to kill for no reason, and no emotion, as if taking someone's life as nothing.
Cold can affect other parts of the body.The expression "get cold feet" has nothing to do with cold or your feet.The expression means being afraid to do something you have decided to do.For example, you agree to be president of an organization.But then you learn that all the other officers have resigned, and all the work of the organizations will be your responsibility.You are likely to get cold feet about being president when you understand the situation.
The expression "give someone the cold shoulder" probably comes from the physical act of turning your back toward someone, instead of speaking to him face to face.You may give a cold shoulder to a friend who has not kept a promise he made to you.Or, to someone who has lied about you to others.
A cold fish is not a fish.It is a person.But it is a person who is unfriendly, unemotional and shows no love or warmth.A cold fish does not offer much of himself to anyone.Someone who is a cold fish could be cold-hearted.Now a cold-hearted person is someone who has no sympathy.Several popular songs in recent years were about cold-hearted men or cold-hearted women who, without feelings, broke the hearts of their lovers.
"Out in the cold" means not getting something that everybody else got.A person might say that everybody but him got a pay raise——he was left out in the cold.And it is not a pleasant place to be.
小題1:When you refuse to speak to a man and treat him in a distant way, you may express by "_____".
A.I give him the cold shoulderB.I think he is a cold-blooded man
C.I think he is a cold fishD.I'm likely to get cold feet
小題2:If Sue shows absolutely no reaction to those awful pictures of starving children in Africa, you will say ______.
A.she is a cold-blooded killerB.she gets cold feet
C.she is a cold fishD.she is out in the cold
小題3:We can use the expression "_____" to describe a man who abandons or hurts his lover without mercy.
A.cold-bloodedB.cold shoulder C.cold feetD.cold-hearted
小題4:The topic of this passage is about _____.
A.the relationship between cold and our bodyB.some expressions about friendship
C.some expressions connected with coldD.how cold weather comes into being

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Have you ever stayed up late? If so, you know that not getting enough sleep can leave you tired and grumpy . Not sleeping enough can also make it harder to think clearly the next day.
Sleep experts have long known that getting a good night’s sleep is important.
It helps kids perform their best during the day. A recent study shows that sleep helps improve problem--- solving skills and creative thinking.
For the study, two groups of volunteers answered a math problem. The group that slept for eight hours solved the problem correctly more often than the group that did not get enough sleep.
While you sleep, your brain is busy doing its “homework”. It sorts out information from your day. Getting enough sleep each night can boost your brainpower. That will help you do your best in school. Experts say that, in return, can lead to better grades.
小題1:What is the best title for the passage?
A.Too Much SleepB.It’s Homework Time
C.Sleep to SucceedD.Math Problems
小題2:The underlined word “boost” in paragraph 5 means ________.
A.reduceB.improve
C.disturbD.worsen
小題3:Why is sleep important?
A.It can improve problem-solving skills and creative thinking
B.It will help you do your best in school
C.It helps your brain sort out information from your day.
D.All of the above
小題4: What did the results of a recent sleep study show?
A.People who sleep enough are good at math
B.Sleep is important for learning
C.If you get enough sleep, you don’t have to do your homework
D.Adults need more sleep than kids

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Mom noticed that something was wrong when I started getting so thirsty, I’d have a lot to drink before bed, which was unusual for me. One time, I opened a big container of apple juice and kept refilling my glass. Before I knew it, I’d drunk the entire container! My mom call my doctor. I then had a few blood tests, and the results were certain ------ I had diabetes, which meant that the amount of sugar in my blood was very high. That can be dangerous, so I had to learn how to control my blood-sugar level.
My eating habits had to change in a big way. With diabetes, I can’t eat a lot of sugar or carbohydrates. I have to figure out exactly how much sugar I plan to eat, and then I get an injection of insulin before the meals to help my body process the food. Also, I test my blood-sugar level often. I’m always trying to keep my blood sugar at a healthy level. The level can drop when I exercise, but that doesn’t keep me out of gym class or off the basketball court ------ I just keep some juice boxes around to boost my blood sugar if I need to.
It’s a lot of work ------ and not a lot of fun ------ to keep track of everything, but I’ve gotten used to my new habits. I was a little scared at first because I wasn’t sure how my life would change. Once I knew what I needed to do, though, it wasn’t a big deal. My life is different now from what it was before, but it has become completely regular to me.
小題1:The first paragraph is mainly about ______.
A.who found the author had diabetes
B.the author’s life before having diabetes
C.how the author was found to have diabetes
D.the author’s eating habits before having diabetes
小題2:The insulin injected into the body before the meals can ______.
A.change people’s eating habitB.help process the food
C.hasten the growth of organsD.prevent high blood level
小題3:What did the author do after knowing she had diabetes?
A.She stopped playing basketball in the gym.
B.She controlled her blood-sugar level strictly.
C.She stopped eating food with natural sugar.
D.She tested her blood-sugar level before every meal.
小題4:What does the underlined word “boost” in Paragraph 2 mean?
A.Increase.B.Control.C.Absorb.D.Test.
小題5: What’s the author’s attitude towards her having diabetes now?
A.Worried.B.Frightened.C.Pessimistic.D.Positive.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Baths have long been considered of medical importance to man. In Greece there are the ruins of a water system for baths built over 3,000 years ago. The Romans had warm public baths. In some baths, as many 3,000 persons could bathe at the same time.
Treating disease by taking bathing has been popular for centuries. Modern medical bathing first became popular in Europe and by the late 1700’s has also become popular in the United States.
For many years frequent bathing was believed to be bad for one’s health. Ordinary bathing just to keep clean was avoided, and perfume was often used to cover up body smells!
By the 1700’s doctors began to say that soap and water were good for health. They believed that it was good for people to be clean. Slowly, people began to bathe more frequently. During the Victorian Age of the late 19th century, taking a bath on Saturday night became comon.
In the United States ordinary bathing was slow to become popular. During the 18th and early 19th centuries, many Americans were known as “The Great Unwashed!” In one American city , for example, a person was only allowed to take a bath every thirty days! That was a law!
Frequency of bathing today is partly a matter of habit. People know that bathing for cleanliness is important to health, Doctors know that dirty bodies increase the chance of diseases. As a result, in the United States, people generally bathe often. Some people bathe once a day at least. They consider a daily bath essential to good health.
小題1:A water system for baths was built by _______ over 3,000 years ago.
A.the Romans B.the Greeks
C.the AmericansD.the Europeans
小題2:Dirty bodies can ______ .
A.ruin one’s businessB.cause disease
C.drive customers awayD.cause good health
小題3:In the 18th century doctors believed that being clean was     .
A.unimportantB.good for healthC.harmfulD.important
小題4:The underlined word perfume probably means     .
A.a(chǎn) sweet smelling substanceB.good health
C.a(chǎn) strange smelling substanceD.large wealth
小題5:Which of the following gives the main idea of the passage?
A.Everybody in America takes a daily bath.
B.We should often take baths
C.Taking baths has become popular in the world.
D.Bathing has become easier and cheaper.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

If teens could reduce the salt they take in every day by 3,000 milligrams (mg), they would cut their risk of heart disease and stroke(中風) greatly in adulthood, researchers say.
Based on the results of a computer modeling analysis, researchers found that a 3,000 mg reduction in sodium(鈉) by teenagers could reduce hypertension by 30 percent to 43 percent when they become adults.
Hypertension, or high blood pressure, is a common condition that may have no symptoms for years, but can eventually cause serious health conditions, including heart attack and stroke.
Other benefits over time as teens hit 50 years of age include a 7-12 percent reduction in coronary heart disease(冠心病), an 8-14 percent reduction in heart attacks, and a 5-8 percent reduction in stroke.
Fast food typically contains too much sodium. One bag of Nacho Cheese Doritos has 310 milligrams. Pizza is one of the biggest problems for teens when it comes to sodium, according to data from the National Center for Health Statistics.
“The additional benefit of lower salt intake early is that we can hopefully change the expectations of how food should taste, ideally to something slightly less salty,” says Dr. Kirsten Bibbins-Domingo, the lead author of the study and associate professor of medicine at the University of California, San Francisco.
“Most of the salt we eat is not from our salt shaker(鹽瓶), but salt that is already added in food that we eat.” she added.
小題1:Which is a benefit of a low sodium diet according to the text?
A.No risk of heart disease.B.Smaller chance of stroke.
C.Low blood pressure.D.Slightly more heart attacks.
小題2:According to the text, 3,000 mg less salt intake daily will reduce hypertension by ________ in adulthood.
A.7%-12% B.8%-14%C.30%-43%D.5%-8%
小題3:What does Dr Kirsten Bibbins-Domingo mean in the last two paragraphs?
A.A lower sodium diet can get teenagers used to less salty food.
B.A good eating habit can help teens have less junk food.
C.Teens should avoid pizzas and other salty foods.
D.We can add more salt from our salt shaker to the food.
小題4:Which of the following can be the best title for the text?
A.Teens Cutting Salt for Healthier Adulthood
B.Diet and Health
C.Sodium Brings Health Concerns
D.A Cause of Hypertension

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Many grown-ups worry that spending too much time playing video games isn’t good for a kid’s health. But some doctors have noticed that kids who bring their game players to the hospital seem less worried about being there. They also seem to feel less pain when they are giving all their attention on a car race or other games.
At a children’s center in Baltimore, Maryland, young kids are finding hospital visits easier to deal with, thanks to a test program called HOPE. Patients in HOPE have a life-threatening condition where their kidneys(腎) no longer get rid of wastes from their blood. To get their blood cleaned, these kids must use the dialysis (透析) machines at the hospital three times a week, for at least three hours each time. HOPE allows kids to play Internet sports, racing, and other games with each other. They will be able to connect with kids in other hospitals who have the same problem. “We want to use the Internet to bring together kids who are ill, and let them know they are not alone,” said Arun Mathews, the doctor of the program. He loved video games himself and got the idea to connect kids all over the country.
Many researchers elsewhere are testing video programs that might help young patients. For example, nine-year-old Ben Duskin of San Francisco, California, who was struggling with cancer helped to design a video game where players got rid of cancer cells.
That’s all great news, because doctors already know that reducing pain and worry helps patients heal(痊愈) faster.
小題1:
According to the passage, the sick kids may feel less pain when they _________.
A.use the dialysis machinesB.a(chǎn)re in a car race
C.a(chǎn)re playing video gamesD.stay alone with illness
小題2:
HOPE allows the sick kids to play Internet games in order to _________.
A.encourage them to fight against the illnessB.get rid of their pain and worry
C.let the kids make more friends D.bring the kids in the country together
小題3:
Which of the following statements is true according to the passage?
A.Grown-ups all think video games are bad for kids’ health.
B.Some doctors think video games may help the sick kids reduce pain.
C.The HOPE is a famous organization all over the world.
D.Arun Mathews is against the testing program.
小題4:
Which can be the best title for the passage?
A.Video Games Are Bad for HealthB.Video Games May Help Reduce Pain
C.A Famous American OrganizationD.HOPE Allows Kids to Play Online Games

查看答案和解析>>

同步練習冊答案